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Ubuntu Security Notice USN-1733-1
February 21, 2013
ruby1.9.1 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
Summary:
Several security issues were fixed in Ruby.
Software Description:
- ruby1.9.1: Interpreter of object-oriented scripting language Ruby
Details:
Jean-Philippe Aumasson discovered that Ruby incorrectly generated
predictable hash values. An attacker could use this issue to generate hash
collisions and cause a denial of service. (CVE-2012-5371)
Evgeny Ermakov discovered that documentation generated by rdoc is
vulnerable to a cross-site scripting issue. With cross-site scripting
vulnerabilities, if a user were tricked into viewing a specially crafted
page, a remote attacker could exploit this to modify the contents, or steal
confidential data, within the same domain. (CVE-2013-0256)
Thomas Hollstegge and Ben Murphy discovered that the JSON implementation
in Ruby incorrectly handled certain crafted documents. An attacker could
use this issue to cause a denial of service or bypass certain protection
mechanisms. (CVE-2013-0269)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.10:
libruby1.9.1 1.9.3.194-1ubuntu1.3
ruby1.9.1 1.9.3.194-1ubuntu1.3
Ubuntu 12.04 LTS:
libruby1.9.1 1.9.3.0-1ubuntu2.5
ruby1.9.1 1.9.3.0-1ubuntu2.5
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1733-1
CVE-2012-5371, CVE-2013-0256, CVE-2013-0269
Package Information:
https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.194-1ubuntu1.3
https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.0-1ubuntu2.5